Cylinder head for engines



T. H. LEIFHEIT.

CYLINDER HEAD FOR ENGINES.

APPLICATION FILED oct. 31. 1921.

1,438,927. Patented Dec. 12, 1922.,

2 SHEETSSHEET 1- Fatented Dec. 52, 1922 monies n2. rinrrnznrr, or serenade, onto.

CYLINDER HEAD FOE ENGKNES.

Application filed hotelier 31, 1921. Serial 1%. 511,348.

To all whom it may concern: I

Be it known. that l, TrioMAsdi. Lair- Herr, a citizen of the United States, residing at Pomeroy, in the county of Meigs and State of Ohio, have invented new and useful Improvements in Cylinder Heads for Engines, of which the following is'a specification.

This invention relates to internal combustion engines, particularlytothat type hav ing a removable cylinder head, and has for its object the provision-of a novel constructionof cylinder head whereby to prevent the spark plugs of the engine from becoming splashed with oil in the event that the pistons become loose and fitbadly or in the event that the cylinder walls become scored. An important object is the provision of a cylinder head which is formed to receive shields which extend below the spark plugs for the purpose of protecting them' from splashing oil, the shields being inltially omitteduntil one or more cylinders leaks oii whereupon the proper shield may be in serted for remedying the defect.

An additional object is the provision of a cylinder head of this character which will be simple and inexpensive in manufacture, highly' efficient in use, durable in service, and a general improvement in the art.

With the above and other objects and advantages in view, the invention consists in the details of construction to-be hereinafter more fully'described and claimed and 1llustrated in the accompanying drawings in which- Figure 1 is a bottom plan view showing a cylinder head constructed in accordance with my invention,

Figure 2 is a cross sectional view through a portion of an engine equipped with my novel device,

Figure 3 is a vertical sectional view taken at right angles to Figure 2,-

Figure 4 is a detail perspective view of one of the slide shields,

Figure 5 is a cross sectional view throughan engine showing a modified form of my device, and Figure 6 is 'a detail perspective view of a modified form of shields.

Referring more particularly to the drawings, the letter A. designates a cylinder block of an engine of the type having a removable cylinder head, B designates the cylinclers, C the valves, and D the chamber immediately above the valves. E designates the usual spark plugs. Ordinarily in engines of the type shown plugs are screwed are substantially above the edge of each. piston or cylinder and itis well understood that when a piston becomes worn and loose or when a cylinder becomes scored, oil leaks up from the crank case, past the piston rings, and splashes onto the spark plugs, oiling and fouling them to such an extent as to interfere very seriously with the proper ignition.

In carrying out my invention which prevents such an actiornl provide a cylinder head 10 which is of the usual size, shape, material and general construction and. which is provided with the threaded holes 11 for the reception of the spark plugs. However, I form,-preferabiy by casting, a pair of substantially triangular depending ribs 12 upon the underside of the cylinder head at each hole therein, these ribs tapering or decreas ing In Width toward either side found most advantageous. Upon their confronting faces these ribs 12 are formed with grooves 13. At the narrower ends of the ribs 12 I provide connecting ribs 14- which are formed with threaded holes 15.

Adapted for association with each pair of ribs .12 is a detachable shield 16 formed of sheet metal, this shield having its side edges engageable slida-bly within the grooves 13 and having one end formed with a flange'17 adapted to engage against the rib- 14 and provided with a hole 18 registering with the hole 15 for the reception of a screw 19 which is for the purpose of holding the shield firmly associated with the ribs. v

Ordinarily, that is until the engine begins to leak oil in any cylinder, the shields'l6' are not used and the cylinder head is substantially the same in its action and utility as the ordinary type. If, however, it should be discovered that a cylinder leaks oil onto its spark plug, it is merely necessary that the operator remove the cylinder head and that he insert a shield 16 in the'grooves 13 in the pair of ribs 12 which arelocated at the sides of the oiling plug. When a shield is in place it will be seen that it will extend below and consequently protect the plug so as to prevent the plug from being splashed with oil and conse uently rendered useless. It will be observed t at the use of my shields does not in any way interfere with the passage of explosive nnxture to the firing points the threaded holes, 1n the cylinder head into which the spark cleaning of the plugs and consequently does, not detract from the power of the engine. In actual practice it is of course apparent that my invention will work for greater efliciency and economy as theexpense of constantly replacing plugs will be avoided, the necesslty of repairmg to overcome the leak will be avoided, and the annoyance of frequent f the plugs will be eliminated.

In Figure 5 I have shown the ribs as curved and the shield 21 as being .correspondingly curved in contra-distinction to the triangular ribs and straight shields of the previously described form. The operation and utility of this modified form is of course the same as that of the first described form.-

While I have shown 1 and described the preferred embodiments of myinvention, it is ofc'ourse to be understood thatI reserve the right to make such changes in the form,

construction and arrangement of parts as will notdepart from the spirit of the invention or the scope of the subjoined claims.

Having thus describedmy invention, 1'

. claim 1. In a cylinder head for internal com-- bustion engines, the" head being provided with spark. plug receiving holes, a pair of ribs formedintegrally upon the underside of the cylinder head at opposite sides of the spark plug holes, the ribs being formed on their confrontin faces withv retaining grooves, and a shield detachably engageable within the grooves of each pair of ribs.

2. In a cylinder head for. internal com bustion engines, the head being provided with spark plug receiving .holes, a .pair of ribs formed integrally upon the underside of the cylinder-head at opposite sides of the spark plug holes, the ribs'being formed on with spark plug receiving holes, apair of ribs formed integrally-upon the underside of the cylinder headat opposite sides of the spark plug holes, the ribs being formed on their confronting faces with retaining grooves, ashield detachably engageable within the grooves of each pair of r1bs, a

connecting'rib at one-end of each pair of ribs formed with .a threaded holes, each shieldhaving a flange engaging against .said connecting rib and provided with a holes registeringwith a hole therein, and a screw passing through said registering holes.

A. In a cylinder head for internal com 'bustion' engines, the head being provided with spark plug. receiving holes, a pair of ribs formed inte ally upon' the underside of the cylinder ead at opposite sides of the spark plu holes, the ribs being formed on their con rontin faces with retaining grooves, and a shiel detachably engageable within the grooves of each pair of ribs, said ribs being substantially triangular in shape whereby the. shield will be inclined with respect to the lower surface of the cylinder head. I

5. In a cylinder head. for internal combustion engines, the head being provided with spark plug receiving holes, a pair of ribs located at opposite sides of each hole,

and a shield 'detachably .engageable with each pair of ribs.

In testimony whereof I afiix my si ature. I THOMAS H. LEIF EIT. 

